The Cancún meeting looks promising - from a climate realist´s point of view

Other countries, including Russia, Canada and Australia are thought to agree but have yet to say publicly that they will not make further pledges

And there will be a considerably smaller CO2 footprint at this year´s meeting:

Few heads of state are expected to attend this year's talks – in sharp contrast to the summit in Copenhagen. However, Hugo Chávez, president of Venezuela, Rafael Correa, president of Ecuador, and Bolivia's Evo Morales have said they will be there. All were accused by Gordon Brown of "holding the world to ransom" at the Copenhagen talks. They will be joined by the presidents of Nicaragua, Costa Rica, Colombia, Brazil and Guatemala.